DE970810C - Circuit arrangement for telephone extension systems with dialer operation - Google Patents

Description

ISSUED OCTOBER 30, 1958

2i a ^z

Rudolf Kraust, Munich

has been named as the inventor

with voter operation

The invention relates to a circuit arrangement for telephone private branch exchanges a voter assigned to the exchange line, who is responsible for both calling stations and for the purpose of Transfer of an existing trunk connection to a requested position is set.

Arrangements of this type are already known. Becomes a voter in these systems for the purpose of reassignment an existing exchange connection is set to a consulted intercom station, so is during the Reversal process prevents the setting of an exchange dialer to a calling station, so cross-checking cannot take place. The subscriber to the calling station must therefore reverse the Waiting for the office voter for the requested position.

It is also known to set an exchange dialer to a calling or an inquired one Body to be carried out through a test with different potentials of the official battery. Through the This unavoidable branching of the DC circuits is the risk of incorrect connections enlarged. There are two relays for shutting down the exchange dialer on a calling or inquired office necessary. Another known circuit avoids current branching by providing one for each trunk line that is independent of the operating voltage External voltage is used; however, this means a considerable effort. the The aim of the invention is to avoid unnecessary waiting times with little effort and proper operation. This is achieved according to the invention in that a single relay to shutdown the Exchange dialer to the connection of a calling station with a common for all exchange dialers, from the operating voltage consumption-independent external voltage source and when setting the official

& 09 644/4

Voter on the. Connection of a consulted point with another external voltage that is common and independent in the same way is switched on to the same switching arm of the exchange dialer. An exemplary embodiment of the invention is shown in the drawing. This is a private branch exchange using dialers with two directions of movement. Internal connections run via the AS, LW selectors. Outgoing and incoming trunk connections are established via the trunk dialer AW .

Outgoing trunk connections

For the purpose of establishing an outgoing exchange connection from the intercom. 2Vi, after lifting the handset, the call searcher AS is set in a known manner to the calling station. It is assumed that the call station N ι is connected to the fourth contact of the seventh row of contacts. The decade switch arm dekjAS is in position 7. A test relay C, not shown, of the call seeker ^ 45 is energized. The feed bridge relay A is switched on via the subscriber loop. By dialing a specific code, the incentive to establish an outgoing exchange connection is given. After setting the line selector LW to the exchange code connection, the following test circuit exists via the switching arm c of the line selector LW:

1. +, IP, II P, IPi, c / LW, 10, iiö, R, -.

Relays P, P1 and R take effect. The code number connection is blocked via contact I2fi. The feed bridge relays X, Y are switched off by opening the contacts 13 px, X4px. A metallic connection in the line selector LW takes place via the contacts 15 ^ 1, 16 ^ 1.

The relay R of the exchange transmission switches on the winding M 2 of the stepping motor for the exchange dialer AW .

2. +, 17 »·, i8zi, IO.W2, Mz, -.

The voter AW begins his straight line movement.

The contact 19 m 2 is opened one after the other and then the contact 20 mx is closed. When the contact 19 m 2 opens, the circuit 2 of the winding M 2 is interrupted. The Mx winding is switched on via contact 20WI:

3. +, iyr, i8zi, zomi, Mx, -.

The selector AW now performs the straight-line movement until the switching arm dekjAW has reached the seventh row of contacts. In this case, the following test circuit is established for the relay Pr , which is fed by a special external voltage K 1:

4. + Kx, 2IW, 22umx, 23fr, IPr, 24ms, dek / AW in position 7, dek / AS in position 7, RL, x ^ px, a / LW, -Kx.

Contact 25 pr is closed by relay Pr and thus winding Mx is switched on even when contact 20 mx is open. This shuts down the public line dialer A W. Relay Pr switches on relay PH .

5. +, 2βpr, PH, -.

The magnet M3 is also switched on.

6. +, 26fr, GL 14, 27 mo, M3, -.

The contact 2jmo is closed as soon as the selector AW leaves the rest position. By means of the magnet M 3, the selector is reversed from the rectilinear movement to the rotary movement. The following holding circuit is established for the magnet M 3:

7. +, 28τ »3, 2jmo,

The Mx winding remains switched on via contact 29 ph even after contact 2 $ pr has been opened. When the magnet M 3 responds, the circuit 4 of the relay Pr at contact 24 ^ 3 is interrupted. The test circuit of the individual line is prepared via contact 30 m 3. When relay Pr drops , contact 25 pr is opened. The winding Mx is now switched on via contact 2gph . Relay Pr interrupts circuit 5 of relay PH at contact 26 pr. After a short drop-out delay, the contact 29 ^ is opened and thus the winding Mx is switched off. There is only circuit 2 of the winding Mt .. The rotary movement of the selector begins by alternately switching on the circuits 2 and 3 of the windings M 2 and Mx. If the exchange dialer ^ 4W reaches the single line of the intercom station Nx, the following test circuit, fed by the external voltage Kx, is established:

8. + Kx ₁ 21W, 22umx, 23fr, IPr, 30 ^ 3, 31 «, III Cx, 32r, a \ AW, 33, al AS, x $ px, a / LW. - Kx.

Relays Pr and C1 are energized. The relay Pr switches on the winding Mx even when the contact 20 mx is open, so that the selector AW is stopped. Relay Pr switches on relay PH in circuit 5, so that contact 29 £ A is closed parallel to contact 25 pr . The relay Cx creates the following blocking circuit:

9. +, 34CI, II Ci, 35MWI or 36 ", cjAW, 74, Bi ₁ Γι, -.

Relay S is switched on by relay Ci.

10. +, IS, IZi, 37Ä, 38cι, 39Λ 40 ^ 2, 41CI, 42A, II Xx, II S, -.

Relay 5 switches on relay Vx.

11. +, 43s, Vx, -. " ⁵ The relay Vx switches the relay B on .

12. +, 44 ^ 1, B, -.

The circuit 1 of the relays P, Pi and R is opened at contact 11 δ. When relays P and P1 drop out, selectors AS, LW are released or returned to the rest position. The incentive line 10 of the code number connection is switched to a second exchange dialer via the contacts 45 b. When relay R drops out , circuit S for relay Pr

and Ci open at contact 32r. The relay Pr drops out. At contact 17 r , the circuits 2 and 3 of the windings M 2 and Mi are opened. The circuit 10 of the relay S is interrupted at the contact 39 r. The supply circuit for relay S now exists via the call station Ni.

13. +, I 5, I Zi, 37Ä, 38C1, ₄ 6r, bjAW, 47, Ni, 33, ajAW, 4ßr, 41CI, 42Ä, II Zi, IIS, -.

The x \ mtsleitung AL is switched through via contact 49s.

The following charging circuit exists for the capacitor C 10:

14. -} -, 5oz> 2, 51W, Cio, 52W, -.

For the purpose of setting the voters who are reached via the exchange line AL , the current surges picked up by relay S are transmitted via contact 49 s over the exchange line. When the relay S drops for the first time during a series of impulses, the relay V 2 is switched on.

15 ·

53 ". 54s.

The charging circuit 14 of the capacitor C10 is interrupted at the contact 50 ^ 2. The capacitor C10 is connected to relay V 2 via contact 55 «2. The relay V 2 remains in the working position during the series of impulses, since the relay V "2 receives current via the charged capacitor C10 when the contact 54s is temporarily open. The relay V 2 short-circuits the loop resistance Wi 1 via contact 56 ^ 2 during the series of impulses. If the contact 54s is open for a longer time after the end of the series of impulses, the relay V 2 drops out via the relay V 2 after the capacitor C10 has completely discharged, and the charging circuit 14 is restored.

Inquiry connections

If there is an exchange connection between the call station Ni and the exchange line AL via the exchange dialer AW, the magnet M 3 and the relays C 1, S, Vi and B are energized.

If the participant of the intercom station Ni wishes to establish an inquiry connection to the intercom station Nz, he must temporarily press the Tai button. The differential relay Zi in the supply circuit 13 of the call station N1 is temporarily excited and an inquiry switchover device Yi is activated via contact 57 * 1. By opening the contacts 58yi, 59yi and closing the contacts 6oyi, 61 yi , the switchover from the exchange line AL to the consultation line 62, 63 takes place. The test relay C of the caller AS is energized. The feed bridge relay A is switched on in the following way:

16. +, lA.b / AS.e ^, 61 yi, Wiz, 49s, 6oy 1.62, al AS, II A ₁ -.

The exchange connection is held via contact goyi and resistance Wi 2 . When the caller AS is set to a consultation line, the contacts 64WII, 6 $ wzi are closed.

The current surges for setting the line selector LW are picked up by relay S and transmitted through contact 49 s to the feed bridge relay A in the house connection set AS / LW. The setting of the line selector LW is then carried out in a known manner. During the series of impulses, the relay V 2 of the exchange transmission in the circuit 15 or in the discharge circuit of the capacitor C10 is kept energized.

It is assumed that the call station 2V2 is connected to the third contact of the fifth row of contacts of the line selector LW . The decade switch arm dekjLW is in position 5 after the setting.

If the call station N 2 is free, the test relay P of the line selector LW is energized. After the call has been made and the intercom station N 2 has reported, the feeder bridge relay Y is switched on.

Assignment

If the exchange connection is to be transferred to the telephone station N 2 via the exchange line AL , the subscriber to the telephone station N 2 has to temporarily press the Ta2 key. The differential relay Z of the house connection set ASjLW is temporarily energized. The relay Z is switched on.

17. +, 66c, Z, 64WI1, 651PIi ₁ 67 *, 68a, -.

At the same time, a circuit for the relays U and K 3 is established via the switching arm djAS:

18. +, K3, U, 6gyi, joumz, 71, djAS, 65WII, 67 λ ;, 68 α, -.

A circuit for the relays UMi and ABi is prepared via contact 72 «.

If the button Ta 2 on the call station N 2 is released, the differential relay Z drops out. At contact 67 λ; the excitation circuit 17 of the relay Z is opened. In the fall time of the relay Z , the relay Pi is switched on.

19. +, 66c, 73z, 74y, II Pi, 75 «, 68a, -.

Once energized, the relay Pi remains in the reverse current circuit of the line selector LW via winding I. The relay Pi opens the contacts 13 ^ 1, 14 ^ 1, so that the feed bridge relays Z, Y are switched off. The metallic connection in the line selector LW takes place via the contacts 15 ^> i, i6 ^> i.

When relay Z drops out after the key has been pressed, the circuit 18 of relays U and if 3 at contact 67 * is also opened. Relay K3 drops out first. During the release time of relay U , relays UMz and ^ 4Si are switched on.

20. +, 72M, I UMz,

A hold circuit is established for the relay UMi , in which the relay UM of the house connection set AS / LW and the starter relay R of the exchange transmission are switched on.

. UM, 65WI1, d / AS, ji, j8umi, II UMi

The winding I of the UMx relay and all the corresponding windings on all exchange lines are short-circuited via contact 8gumi. Therefore, during the transfer status on the exchange line AL , the transfer status cannot be established on any other exchange line.

ίο In the release time of relay U , if relay UMi is already excited, the blocking circuit 9 of relay Ci at contact 36 u or 3 $ umi is interrupted. Relay C1 drops out. The feed circuit 13 of the relay 5 is opened at the contacts 41 ei, 38ei.

The relay S drops out. Circuit 11 of relay Vx is interrupted at contact 43 s. The relay B is now kept energized independently of contact 44 «1 via contact jgumi. The consultation switch Yt vnrd held over 86 to τ and 87 ei. The exchange dialer AW is returned to the rest position in a known manner, not shown. In the rest position of the selector, the contact 27 mo is open and thus circuit 7 of the magnet M 3 is interrupted.

By switching on the relay R in the circuit 21, the windings M 2 and Mi in the circuit 2 and 3 are switched on in the manner described.

If the exchange dialer AW reaches the row of contacts of the interrogated intercom station Nz, the relay Pr is switched on in the following way:

22. + K2, 8oumi, 23fr, I Pr, 24W3, dekJAW, line 5, dek / LW, 8ium, 8zfi, - Kz.

When the exchange dialer AW is set to the row of contacts of the queried point N 2 , a test circuit for the relay Pr is established, which is dependent on the second external voltage Kz , while the test circuit of the exchange dialer AW is dependent on the external voltage when it is set to a calling point Ki receives electricity.

Relay Pr switches on relay PH in circuit 5 and magnet M 3 in circuit 6. The magnet M3, which causes the switchover from the linear movement to the rotary movement, is kept excited in the holding circuit 7. . The magnet M 3 opens the circuit 22 at the contact 24 ^ 3. The relay Pr drops out. The circuit 5 of the relay PH is opened at the contact 26 ^ r. The test circuit for the individual line is prepared via contact 30JW3. If the relay PH is in the rest position again, the windings Mz, Mi are switched on again. The exchange dialer AW is turned into contact row 5. If the exchange dialer AW reaches the intercom station Nz, the following test circuit is established:

23. + K2, 8oumi, 23fr, IPr, 307M3, 31η, III Ci, 32r, ajAW, 83, ajLW, 15 ^ 1, ajAS, 62, 84WWI, 85 ci, - K 2.

Relay Pr shuts down the public line dialer AW via contact 25 -pr. The relay PH is switched on again in circuit 5. The following blocking circuit exists via relay Ci:

24. +, 34 ", II Ci, 362t, c \ AW, £ 2, Tz, -.

Relay C1 switches on relay S in circuit 10. The relay Vi is then again energized in circuit 11. Relay Vi holds relay B in circuit 12.

The relay Ci opens the holding circuit of the inquiry switchover device Yi at contact 87ei. The yi contacts are returned to the rest position.

By opening the contacts 6oyi, 6iyi and closing the contacts 58yi, 5o.yi, switching back from the inquiry line 62, 63 to the exchange line AL takes place. The circuit 16 of the relay A is interrupted. The relay A releases the house connection set AS / LW and causes the voters to be returned to the rest position. The circuit 21 of the relays UM, UMi and R is interrupted. These relays return the contacts to their rest position. The transfer status is ended. The holding circuit of the relay ^ 4Si is opened at the contact 8gumi. The following supply circuit exists for the N 2 call station:

25. +, I S, I Xi, 37h, 38CI, φ, h \ AW, 91, Nz, 83, a \ AW, 48 /, 41CI, 42A, II Xi, II 5, -.

The call station N 2 is now connected to the exchange line AL and can continue the exchange call.

When the connection is terminated, the circuit 25 via relay S is opened by hanging up the receiver at the call station N 2. The relay S drops out and interrupts the circuit 11 of the relay Vi at contact 43 s. The office dialer AW ^{is returned to the rest position lo} ° in a known manner, not shown. When relay Vi drops out , circuit 12 of relay B at contact 44 t) 1 is interrupted. The trunk line AL is now available for a new assignment.

Claims (10)

Patent claims: i. Circuit arrangement for telephone branch exchange systems with an exchange line dialer assigned to the exchange line, which is set both to the calling station and for the purpose of transferring an exchange connection to an intercom station and checks with an external potential that is independent of the operating voltage, characterized in that a single relay (Pr) to shut down the exchange line dialer (AW) to the connection of a calling station with an external voltage source (Ki) common to all exchange dialers and independent of the operating voltage, and when setting the exchange dialer (AW) to the connection of an interrogated station with another external voltage common and independent in the same way (Kz ) is switched on to the same switching arm (dekjAW or ajAW) of the exchange dialer (AW) . 2. Circuit arrangement according to claim i, characterized in that the test relay (Pr) of the selector (AW) for checking the group of the caller or questioned person after the group check is switched on to the switching arm (a) of the selector for checking the individual line of the caller or questioned person. 3. Circuit arrangement according to claim 1, characterized in that the test relay (Pr, Pr] C 1) of the selector from the external voltage characterizing a caller (Kz) to the external voltage characterizing an inquired person (K 2) is switched over by the switching state of the exchange transmission. 4. Circuit arrangement according to claim 1, characterized in that the test relay (Pr) of the selector when setting to a caller via the group identifier (dek / AS) of the house caller (AS) and the facilities ao to identify an exchange connection is controlled. 5. Circuit arrangement according to claim 4, characterized in that the test relay (Pr) of the selector is controlled when setting to an Anas calling via the group identifier (dekjAS) of the house call seeker (AS) and via the line selector (LW) set by an exchange code . 6. Circuit arrangement according to claim 5, characterized in that the Dekadenschaltarm (dek'iAS) of the house call seeker is connected to the switch arm of a voice wire of the line selector (LW) . 7. Circuit arrangement according to claim 1, characterized in that the test relay (Pr) of the selector when setting to a questioned person via the group identifier (dek / LW) of the line selector of the inquiry connection and the facilities (contact 81 to) for identifying the switching state of the inquiry path is controlled. 8. Circuit arrangement according to claim 1, characterized in that the test relay (PrjCi) of the selector for the individual line test of a caller or questioned person to the switching arm (a) of a voice wire of the selector (AW) is switched on. 9. Circuit arrangement according to claim 2, characterized in that the switching of the test relay (Pr) from the group test to the individual line test is carried out by a device (M 3) which switches the drive device of the selector from the linear movement to the rotary movement. 10. Circuit arrangement according to claim 2, characterized in that the test relay (PWCi) of the selector for the individual line test via a contact (32? -) of the starting relay (R) of the selector to the switching arm ( a) is switched on. Considered publications: German Patent Specifications Nos. 286 949, 660 675, 236, 701 244, 717 808, 746 355, 816 707. For this 1 sheet of drawing € n © 509565/87 9.55 (809 644/4 W. 5 *)